Bonus slots games are online casino slot machines that have some extra bonus features which are unlocked by forming a specific combination on the reels. These bonus features are some sort of mini games that are not only fun to play, but also give a great chance of winning more money from the game, like free spins, multipliers, and free cash from a mini game. Hence, the games are termed bonus slots, and their featured bonus games happen to be among the best aspects of any slots game.